!!!Jython JTextComponent 1
[JTextComponent 1][Jython Swing][Swing][Jython][Python]

!!方針
*半ば強引に、[[Swingで作成したサンプル|JTextComponent 1]]を Jythonに書き換えてみる。

!!内容
*メニューとアクションの割付
*キーボード押下との割付
*Undo、Redoの実装
*Documentの利用
*Documentのイベント感知

!!ソースコード
::実行例
{{ref_image js_jtext.jpg}}
::ソースコード
 # -*- coding: utf-8 -*-
  
 from java.lang import *
 from java.awt import BorderLayout,Event
 from java.awt.event import ActionEvent, KeyEvent
 from java.util import HashMap, Map 
 
 from javax.swing import AbstractAction, Action, InputMap
 from javax.swing import SwingUtilities, JFrame, JMenu, JMenuBar, JScrollPane, JTextArea, KeyStroke
 from javax.swing.event import UndoableEditEvent, UndoableEditListener
 from javax.swing.text import DefaultEditorKit, Document, JTextComponent
 from javax.swing.undo import UndoManager
  
 class JTextTest(object):
     
     def createUI(self):
         frame = JFrame("TextTest")
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
 
         txtArea = JTextArea(10, 30)
         frame.contentPane.add(JScrollPane(txtArea), BorderLayout.CENTER)
 
         # TextComponentが持つActionをMapに格納
         actionMap = {}
         for action in txtArea.actions:
             actionMap[action.getValue(Action.NAME)] = action
 
         undo = UndoManager()
         action_param = {}
         action_param['undo'] = undo
         redoAction = RedoAction(**action_param)
         action_param['redoAction'] = redoAction
         undoAction = UndoAction(**action_param)
         action_param['undoAction'] = undoAction
 
         # メニューを作成
         menu = JMenu("Edit")
         menu.add(actionMap.get(DefaultEditorKit.cutAction))
         menu.add(actionMap.get(DefaultEditorKit.copyAction))
         menu.add(actionMap.get(DefaultEditorKit.pasteAction))
         menu.addSeparator()
         menu.add(undoAction)
         menu.add(redoAction)
         menu.addSeparator()
         menu.add(actionMap.get(DefaultEditorKit.selectAllAction))
 
         mb = JMenuBar()
         mb.add(menu)
         frame.JMenuBar = mb
 
         # Documentのイベント感知(Undo Redo 管理を行う)
         doc = txtArea.document
         doc.addUndoableEditListener(UndoEventHandler(**action_param))
 
         # テキストのUndo、Redoにキーを割り当てる (Ctrl+z,Ctrl+y)
         inputMap = txtArea.inputMap
         undoKey = KeyStroke.getKeyStroke(KeyEvent.VK_Z,Event.CTRL_MASK)
         redoKey = KeyStroke.getKeyStroke(KeyEvent.VK_Y,Event.CTRL_MASK)
         inputMap.put(undoKey, undoAction)
         inputMap.put(redoKey, redoAction)
 
         frame.pack()
         frame.visible = True
 
 class UndoEventHandler(UndoableEditListener):
         def __init__(self, undo, undoAction, redoAction):
             self.undo = undo
             self.undoAction = undoAction
             self.redoAction = redoAction
             
         def undoableEditHappened(self, e):
             self.undo.addEdit(e.edit)
             self.undoAction.updateState()
             self.redoAction.updateState()
 
 class UndoAction(AbstractAction):
     def __init__(self, undo, redoAction):
         super(UndoAction, self).__init__("Undo")
         self.undo = undo
         self.redoAction = redoAction
         self.enabled = False
 
     def actionPerformed(self, e):
         try:
             self.undo.undo()
         except Exception, ex:
             ex.printStackTrace()
         self.updateState()
         # Redo を可能に
         self.redoAction.updateState()
 
     def updateState(self):
         self.setEnabled(self.undo.canUndo())
 
 class RedoAction(AbstractAction):
     def __init__(self, undo):
         super(RedoAction, self).__init__("Redo")
         self.undo = undo
         self.enabled = False
 
     def actionPerformed(self, e):
         try:
             self.undo.redo()
         except Exception, ex:
             ex.printStackTrace()
         self.updateState()
 
     def updateState(self):
         self.setEnabled(self.undo.canRedo())
 
 class Invoker(Runnable):
     def run(self):
         jtt = JTextTest()
         jtt.createUI()
 
 SwingUtilities.invokeLater(Invoker())